That is what that sounds like. Is it typically hot where you are? If so you want to think about getting a Johnson cm 30 pump. It flows more which keeps the temps down cause these cars are prone to heat soak.. When you get heat soak the supercharger will not kick on because temp to high so the computer shuts down the kompressor to protect the motor. If it is hot where you are and drive the car hard you will experience this even after replacing the pump. That is why you will have to upgrade to Johnson pump. I live in California and when it was hot I went thru the same thing until I upgraded to Johnson pump. You can find em on eBay..

 

You got exactly what is my problem . Bogota is not hot, but that day I got in a traffic jam and it was a hot day......Like I told you I already order and pay for half the price of the original mb pump. The other thing I noticed is that the coolant is a bit dark and thick/dense and maybe it can be the original one since my car is only 30.000 kilometers that is like 17 k miles. I will flush it and change it. About he Johnson pump, where else different than ebay can I get it. The only way of paying in ebay is with paypal and they do not accept Colombian credit cards there........How is the installation and the wire connection of that pump?thx

 

Problem solved, mb dealer change the water pump that cools the kompressor radiator and now the air going inside the engine is 65 degrees and its reving ok.thanks to all.now I have back my fast c32 ///AMG.

 

If it fails again, I would definitely upgrade to the Johnson pump. The stock pumps are not the best.